kls490 wrote:MUCH OBLIGED for the code/instructions you provided. They appear to work, as the text shown in tabs, toolbar, & Bookmarks, is now back to a larger, readable size. The only difference is (With the Theme & Font Size Changer Addon), I was also able to display the text in bold font which further enhanced my ability to read it.

Thanks, Eckard. Some great info here and I've applied some to my own Firefox. As of getting Firefox 57.0 installed I've done some userChrome.css tweaking of Firefox for the first time in my life - just using snippets of code posted on the forum by knowledgeable folks like yourself. I'm now really happy that 57.0 forced me into doing this. I've learnt more today about Firefox than I have in the past God knows how many years.

By any chance could you point me to some websites that will help me in learning this userChrome.css coding for Firefox properly. (I think it looks like it is worth the effort to learn a little bit more.)

Also is it possible to force Firefox to reload the user.Chrome.css without restarting Firefox?

Also are there other programs that use this "css" (if that is what is called) coding? What does "css" stand for?

Also is it possible to force Firefox to reload the userChrome.css without restarting Firefox?

Unfortunately no. Before FF 56 it was possible to use the css codes with the "Stylish" add-on instead of the userChrome.css file. The "styles" created with Stylish did not need restarts of FF which was an immense advantage compared with the userChrome.css file.

You know what would be pretty brilliant maybe? Not sure if it's possible, but a visual userChrome code injector/editor add-on. It could have a page with all these options to change things and you could see what the browser would look like before a restart as well as see what code would be injected into userChrome and even edit userChrome if need be right then and there.

The code works for me in the Firefox 57 Mac version. Frequent errors are :the capital C in userChrome.css omitted,the file has a .txt suffix, e.g. userChrome.txt or userChrome.css.txt,you didn't put the userChrome.css file in the the chrome folder or you didn't put the chrome folder in the profile folder,you didn't restart Firefox.

Very grateful not just for the code and directions but also for the above troubleshooting information. I fell for the ".css.txt" boo-boo before your suggestion. Tabs, address bar, and Bookmarks Toolbar are all better now. Thanks VERY much.